Anatomy and physiology unit 2: Tissues

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56 Terms

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adi

fat

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chondr

cartliage

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-cyt

cell

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epi

upon

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-glia

gue

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hist

web, tissue

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hyal

resemblance to glass

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inter

among, between

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macr

large

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neur

nerve

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os

bone

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phag

to eat

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pseud

false

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squam

scale

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strat

layer

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stria

groove

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endo

within

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lys

to break up

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pino

to drink

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syn

together

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stem cells

cells that have the ability to divide many times and yield new cells that then specialize.

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pluripotent stem cells

have the power to become many different types cells by tissue type.

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multipotent

can become more cells of that tissue type

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unipotent

limited to only one type

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zygote

occurs after fertilization, the nuclei of the sperm and egg combine to create a complete….then divides to 2,4, and 8.

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morula

the zygote divides to 2,4, and 8 cells until a solid ball of cells formed called a…..

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blastocyt

when cells begin to organize themselves into layers with a hallow space and become..

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gastrula

after several days of growth the blastocyst develops different layers of the cell and becomes…

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ectoderm

On the exterior of an embryonic germ layer, becomes nervous tissue

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mesoderm

In the middle of embryonic germ layer, become muscle and connective tissue (remember mesenchyme)

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endoderm

Is the interior layer of the embryonic germ layer that becomes epithelium (which can also come from the other two). These layers eventually pinch of a ‘bubble’, which becomes the amniotic sac

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how are tissues maintained?

growth and replacement of damaged / dead cells

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virchow

cells come from cells

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mitosis

cell cycle: interphase P.M.A.T cytokinesis: regulated by hormones and growth factors

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ectoderm

this germ layer gives rise to the epidermis, glands on skin, some cranial bones, pituitary and adrenal medulla, the nervous system, the mouth between cheek and hums, the anus

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mesoderm

this germ layer gives rise to connective tissues proper, bone, cartilage, blood, endothelium of blood vessels, muscle, synovial membranes, serous membranes lining body cavities, kidneys, lining of gonads

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endoderm

this germ layer gives rise to lining of airways and digestive system except the mouth and distal part of digestive system (rectum and anal canal); glands (digestive glands, endocrine glands, adrenal cortex)

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nervous tissue

brain, spinal cord, nerves

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muscle tissue

cardiac muscle, smooth muscle, skeletal muscle

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epithelial tissue

lining of GI tract organs, hallow organs, skin surface (epidermis)

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connective tissue

fat, soft padding tissue, bone, tendon

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composed of tightly packed sheets of cells with little extracellular material between them. exhibits polarity, has a apical surface which opens to the outside / internal space (lumen) which possess modifications including microvilli and cilia, avascular, high regeneration capacity

epithelial tissue structure

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microvilli

increases membrane surface area

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cilia

aid in movement of a substances across the layer

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tight junctions

zipper like junctions prevent intercellular leakage

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desmosomes

hold adjacent cells together

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epithelial location

ETs cover us and line us

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epithelial function

PASEF: protection, absorption, secretion, excretion, filtration

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simple

single layer of cells

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stratified

many layers of cells

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squamous

flattened cells

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cuboidal

square-shaped cells

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columnar

elongated cells (taller than wide) nucleus found at the bottom

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simple squamous epithelium

a single layer of flattened cells, generally allow for (function) = easy passage (diffusion) of substances. located in lining of air sacs of lungs, capillaries and body cavities.

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simple cuboidal epithelium

a single layer of square shaped cells, function is secretion and absorption, located in the lining of kidney tubules, and duct of glands

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simple columnar epithelium

a single